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Navigating graph structures

This example shows that FoamTree can be used to navigate graph structures in general (not just single-rooted trees). The demo uses a single-layer sub-graph of the "current" node and navigates through the graph, leaving a breadcrumb of (clickable) previous states.

What's in the code?

• An example of navigating a graph using a single-level tree view.
• A way to utilize the imageData option to create a snapshot of the current visualization state.